A review of mobility metrics for next generation vehicle mobility models |
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| Institution: | 1. Vehicle Systems Development Corporation, Toronto, Ontario, Canada;2. U.S. Army CCDC Ground Vehicle Systems Center, Warren, MI, USA;3. National Research Council Canada, Ottawa, Ontario, Canada;1. School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China;1. Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;2. Department of Biosystems Engineering, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon 24341, Republic of Korea;3. Department of Smart industry machinery, Korea Institute of Machinery and Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Republic of Korea;4. Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea;1. Kyushu Institute of Technology, Graduate School of Life Science and Systems Engineering, Kitakyushu 808-0196, Japan;2. Polytechnic of Bari, 70125 Bari, Italy;3. University of Salento, 73100 Lecce, Italy;1. Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, USA;2. Pratt and Miller, NC, USA;3. Department of Mechanical Engineering, University of Pretoria, Pretoria, South Africa;4. Navistar, Chicago, IL, USA |
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| Abstract: | In the United States, the NATO Reference Mobility Model (NRMM) has been used for evaluating military ground vehicle mobility and the Vehicle Cone Index (VCI) has been selected as a mobility metric. VCI represents the minimum soil strength required for a vehicle to consistently make a specific number of passes, usually one or fifty passes. In the United Kingdom, the Mean Maximum Pressure (MMP) has been adopted as a metric for assessing military vehicle cross-country mobility. MMP is the mean value of the maxima occurring under all the wheel stations of a vehicle. Both VCI and MMP are empirically based. This paper presents a review of the basis upon which VCI and MMP were developed, as well as their applications to evaluating vehicle mobility in practice. With the progress in terramechanics and in modelling and simulation techniques in recent years, there is a growing desire to develop physics-based mobility metrics for next generation vehicle mobility models. Based on the review, criteria for selecting physics-based mobility metrics are proposed. Following these criteria, metrics for characterizing military vehicle traction limits and traversability on a given operating area are recommended. |
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| Keywords: | Cross-country performance Empirically based mobility metrics Mean maximum pressure Military vehicles Mobility metrics Physics-based mobility metrics Tracked vehicles Vehicle cone index Vehicle mobility models Wheeled vehicles |
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